<template>
  <div>
    <!-- 弹出层的头部区域 -->
    <van-nav-bar title="频道管理" class="bgc">
      <template #right>
        <van-icon name="cross" size="0.37333334rem" color="white" @click="closeFn" />
      </template>
    </van-nav-bar>
    <!-- 我的频道 -->
    <div class="my-channel-box">
      <div class="channel-title">
        <span>我的频道
          <span class="small-title">
            点击{{isEdit ? '删除': '进入'}}频道
          </span>
        </span>
        <span @click="editFn">{{isEdit ? '完成': '编辑'}}</span>
      </div>
      <!-- 我的频道列表 -->
      <van-row type="flex">
        <van-col span="6" v-for="item in userChannelList " :key="item.id" @click="deleteChannelClickFn(item)" class="user-select">
          <div class="channel-item van-hairline--surround">
            {{item.name}}
            <!-- 删除的徽标 -->
            <van-badge color="transparent" class="cross-badge" v-show="isEdit && item.id !== 0">
              <template #content>
                <van-icon name="cross" class="badge-icon" color="#cfcfcf" size="0.32rem" />
              </template>
            </van-badge>
          </div>
        </van-col>
      </van-row>
    </div>

    <!-- 更多频道 -->
    <div class="more-channel-box">
      <div class="channel-title">
        <span>点击添加更多频道：</span>
      </div>
      <!-- 更多频道列表 -->
      <van-row type="flex">
        <van-col span="6" v-for="item in uncheckChannelList " :key="item.id" @click="addChannel(item)">
          <div class="channel-item van-hairline--surround">{{item.name}}</div>
        </van-col>
      </van-row>
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      isEdit: false // 我的频道删除的徽标的显示/隐藏
    }
  },
  props: {
    userChannelList: Array,
    uncheckChannelList: Array
  },
  methods: {
    // 编辑按钮的点击事件
    editFn() {
      this.isEdit = !this.isEdit
    },
    // 更多频道每个对象的点击事件
    addChannel(channelObj) {
      console.log(channelObj)
      // 在编辑状态才能添加频道
      if (this.isEdit) {
        // 不要直接修改props 传给父亲去增加频道
        this.$emit('addChannelEV', channelObj)
      }
    },
    // 删除的徽标的点击事件
    deleteChannelClickFn(channelObj) {
      if (this.isEdit) { // 在编辑状态在才能删除
        if (channelObj.id !== 0) { // 推荐不能删除
          // 交给父组件处理
          this.$emit('deleteChannelEV', channelObj)
        }
      } else { // 切换频道状态
        // 关闭频道弹出层
        this.$emit('colseEV')
        // 切换频道
        this.$emit('input', channelObj.id)
      }
    },
    // 关闭按钮的回调
    closeFn() {
      this.$emit('colseEV')
    }
  }
}
</script>

<style scoped lang="less">
.van-popup,
.popup-container {
  background-color: transparent;
  height: 100%;
  width: 100%;
}

.popup-container {
  display: flex;
  flex-direction: column;
}

.pop-header {
  height: 90px;
  background-color: #007bff;
  color: white;
  text-align: center;
  font-size: 14px;
  position: relative;
  .title {
    width: 100%;
    position: absolute;
    bottom: 15px;
  }
}

.pop-body {
  flex: 1;
  overflow: scroll;
  padding: 8px;
  background-color: white;
}

.my-channel-box,
.more-channel-box {
  .channel-title {
    display: flex;
    justify-content: space-between;
    font-size: 14px;
    line-height: 28px;
    padding: 0 6px;
  }
}

.channel-item {
  font-size: 12px;
  text-align: center;
  line-height: 36px;
  background-color: #fafafa;
  margin: 5px;
}

/*删除的微标 */
.cross-badge {
  position: absolute;
  right: -3px;
  top: 0;
  border: none;
}

/*提示文字 */
.small-title {
  font-size: 10px;
  color: gray;
}
// 设置频道管理的背景颜色
.bgc {
  background-color: #007bff;
}
// 设置用户不能选中文本
.user-select {
  user-select: none;
}
</style>
